System and method for controlling shift hunting in variable transmissions
US8862351B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2012 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Apr 11, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2520/105
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of controlling a transmission (100) for a machine is disclosed. The transmission includes a variator (104). The transmission is operated in a first operating range (301). It is determined whether a current speed ratio is within a first predetermined range of a speed ratio associated with a first synchronous point (304) lying between the first operating range (301) and the second operating range (302). A desired speed ratio is determined and it is determined if the desired speed ratio is within a second predetermined range of the speed ratio. A shift between the first and second operating ranges (301, 302) is prevented and the variator (104) is controlled to hold the current speed ratio if the desired speed ratio is within the second predetermined range or the rate of acceleration of the machine is below the threshold acceleration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.